# Copyright (c) 2007 Chris Moyer http://coredumped.org
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# IN THE SOFTWARE.

from ds import DataSource

class Absolute(DataSource):
	"""
	Absolute is for counters which get reset upon reading. This is 
	used for fast counters which tend to overflow. So instead of 
	reading them normally you reset them after every read to make 
	sure you have a maximum time available before the next overflow. 
	Another usage is for things you count like number of messages 
	since the last update.

	Name: The name of this DS
	Heartbeat: How often we must be updated before we are "unknown" default 300 seconds
	Min: Minimum value to be stored. Default 0
	Max: Maximum value to be stored. Default None (unbounded)
	"""
	def __init__(self, name, hb=300, min=0, max=None):
		self.name = name
		self.type = "ABSOLUTE"

		if(min is None):
			min = "U"
		if(max is None):
			max = "U"

		self.arguments=str(hb)+":"+str(min)+":"+str(max)
